I refuse to use that stuff. I have a centipede turf lawn. We do have a LOT of weeds in the spring pop up and my wife gets on my tail about it. I tell her to hold on...
About May, I will mix up 8-12 gallons of spray using Celcius WG herbicide and some of that blue stain/marker and spray it all over our yard (~1 acre).
About 3 weeks later, the weeds are gone, I've put out some fertilizer and the yard looks great, wife isn't complaining anymore. I would have to do all of this if I put down a pre-emergent..... How do I know? Because I've done it. I'll have to apply the Celcius again in late August or so, if we have decent rain through the summer, but that's it.
The Celcius is not Home-Depot grade, weak garbage. It's professional-grade, high-quality stuff that WORKS. It's not cheap, either, that's why you've probably never heard of it. The name is now owned by Bayer, but they don't have the stones to try to get a big box to sell it....